Decrease in water pollution
Eutrophication, often due to excess nutrients in water bodies, leads to dense plant growth, especially algae, which when decaying consumes a large amount of oxygen. This process depletes the oxygen available in the water, negatively impacting aquatic life.

In a messenger RNA molecule, untranslated regions (UTRs) are present at:
I. 5' end before start codon
II. 3' end after stop codon
III. 3' end before stop codon
IV. 5' end after start codon